CN102589408A - Hub type concrete self-shrinkage measuring device - Google Patents
Hub type concrete self-shrinkage measuring device Download PDFInfo
- Publication number
- CN102589408A CN102589408A CN2012100498179A CN201210049817A CN102589408A CN 102589408 A CN102589408 A CN 102589408A CN 2012100498179 A CN2012100498179 A CN 2012100498179A CN 201210049817 A CN201210049817 A CN 201210049817A CN 102589408 A CN102589408 A CN 102589408A
- Authority
- CN
- China
- Prior art keywords
- concrete
- self
- hub
- type container
- taper type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005259 measurement Methods 0.000 claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract 2
- 239000000969 carrier Substances 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 8
- 238000000465 moulding Methods 0.000 description 6
- 230000008602 contraction Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011545 laboratory measurement Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Images
Landscapes
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention discloses a hub type concrete self-shrinkage measuring device, which relates to a concrete measuring device and solves the problems of unreal data of shrinkage valve, error and the like caused by influence of concrete subjected to template shrinkage effect in the process of measuring self-shrinkage of concrete in the existing laboratory. According to the hub type concrete self-shrinkage measuring device, a hub (4) is fixedly sleeved on a cylindrical rotary body (3) which is rotatably arranged in grooves (2-1) at the upper ends of two supporting columns (2). Four through holes (5-1) are uniformly arranged at the upper part of a crank handle (5) along the circumferential direction. The crank handle (5) is fixedly arranged at one end of the cylindrical rotary body (3). A fixed rod (6) is sequentially arranged on the through holes (5-1) of the crank handle (5) and the supporting columns (2) in a penetrating way. A plurality of installation holes (4-1) are uniformly arranged on the hub (4) along the circumferential direction, and a plurality of concrete measuring carriers (7) are fixedly arranged in the installation holes (4-1) of the hub (4). The invention is suitable for the measurement of concrete self-shrinkage in the laboratory.
Description
Technical field
The present invention relates to a kind of concrete measurement mechanism, be specifically related to a kind of hub-type concrete self-constriction measurement mechanism.
Background technology
Self-constriction is meant the minimizing of cement-based material apparent volume or length under the condition of sealed maintenance, isothermal, and it is the reason that causes self-constriction that chemistry reduces; Condensing is the part of self-constriction, occurs in the moulding stage; It is the part of self-constriction that self-desiccation shrinks, and also is a most important part.Because the structure formation time of cement slurry still is difficult to provide clear and definite judgement (end in moulding stage) at present, the test duration of therefore a lot of self-constrictions is during from initial set, also has from building beginning in 1 day after the moulding.And from test in 1 day after the initial set or after building moulding, condensing part has been left in the basket, and the result that record this moment has influenced the accuracy of self-constriction greatly.Domestic scholars proposes areal survey is carried out in the concrete self-constriction: adopt vertical metering system and non-contact sensor that condensing test initial time is promptly begun after building moulding ahead of time; Adopting horizontal rectangular formula of survey and non-contact sensor can test 1 day self-desiccation in the past shrinks; Adopt vertical clock gauge can test later long-age self-constriction in 1 day.Though this method can effectively solve condensing problems of measurement, need moulding respectively to be used to measure the test specimen of condensing test specimen and self-desiccation contraction, and all need non-contact sensor to monitor separately.
In addition; Usual method in the self-constriction of laboratory measurement concrete is: at a rectangular parallelepiped both mold ends end built-in metal post; Cover with the plastic sheeting parcel behind the casting concrete; With the non-contacting measuring method of miking or non-contact sensor, measure the displacement of metal column subsequently, can measure the linear contraction amount of rectangular parallelepiped concrete sample.The mould of this measurement concrete shrinkage is a rectangular parallelepiped; In the concrete coagulation hardening process; Side template all around and base plate all can produce certain constraining force to concrete; Hinder concrete contraction, the data of the shrinkage value of measuring in this case are false, and domestic correlative study confirms that also side template causes the measuring error of self-constriction very big.
Summary of the invention
The objective of the invention is to measure the influence that concrete in the concrete self-constriction amount process is vulnerable to the template effect of contraction in order to solve the current experiments chamber; The data that cause measuring shrinkage value are untrue; The problems such as error that produce, and then a kind of hub-type concrete self-constriction measurement mechanism is provided.
Technical scheme of the present invention is: hub-type concrete self-constriction measurement mechanism comprises base and two pillars, and the upper end of each pillar all has groove, two parallel being packed on the base of pillar; It comprises that also cylinder rotor, wheel hub, wind, fixed bar and a plurality of concrete measurement take up device, and wheel hub is fixedly set on the cylinder rotor, and the cylinder rotor is rotatably installed in the groove of two pillar upper ends; The top of wind along the circumferential direction evenly has four through holes; Wind is packed in an end of cylinder rotor, and fixed bar is located on the through hole and pillar of wind successively, along the circumferential direction evenly has a plurality of mounting holes on the wheel hub; A plurality of concrete measurements take up device and are packed in the mounting hole of wheel hub; Each concrete measurement takes up device and includes loam cake, lower cover, taper type container, two sensors and two steel discs, and the taper type container is the stainless steel taper type container of inner wall smooth, fills up fresh concrete in the taper type container; The center of loam cake and lower cover all has a center pit; And loam cake and lower cover cover the two ends up and down that are contained in the taper type container respectively, each pre-buried steel disc of the two ends up and down of fresh concrete, and the center pit of the position of steel disc and loam cake and lower cover is relative; Two sensors wear respectively and be packed in loam cake with under cover; Each sensor all center pit with loam cake and lower cover is relative, and leaves the gap between each steel disc and each sensor, and sensor is an eddy displacement sensor.
The present invention compared with prior art has following effect: 1. the stainless steel taper type container that taper type container of the present invention is an inner wall smooth, there are not corner angle, and the frictional resistance that receives during concrete shrinkage is little; 2. taper type container of the present invention is along with wind can arbitrarily angledly overturn; Measure when condensing, the taper type container is fixed on vertical position, can change the spatial attitude of taper type container subsequently at any time; As: the horizontal or vertical placement of taper type container; Rotate 90 degree or 180 degree, the adjustment taper type container position that wind can be easily and fast, through fixed bar can be easily and fast the position of definite taper type container; Effectively avoided the gravity of fresh concrete and the measuring error that produces with the constraining force of template, measured self-shrinking value is more accurate; 3. eddy displacement sensor of the present invention can accurately be measured the poor of concrete displacement, and promptly concrete shrinkage value has compensated the influence of environment temperature to the vortex sensor measuring error, has guaranteed the measuring accuracy of concrete shrinkage value; 4. of the present invention simple in structure, be easy to realize that production cost is low, and is applied widely.5. the present invention can measure the concrete in two taper type containers simultaneously, and efficiency of measurement is high, reduces measuring equipment and floor area, has reduced the measurement cost.
Description of drawings
Fig. 1 is a front view of the present invention; Fig. 2 is the cut-open view of Fig. 1 along the A-A place; Fig. 3 is the structural representation that the concrete measurement takes up device; Fig. 4 is that the B of Fig. 1 is to view.
Embodiment
Embodiment one: combine Fig. 1-Fig. 4 that this embodiment is described, the hub-type concrete self-constriction measurement mechanism of this embodiment comprises base 1 and two pillars 2, and the upper end of each pillar 2 all has groove 2-1; Two pillar 2 parallel being packed on the base 1; It comprises that also cylinder rotor 3, wheel hub 4, wind 5, fixed bar 6 and a plurality of concrete measurement take up device 7, and wheel hub 4 is fixedly set on the cylinder rotor 3, and cylinder rotor 3 is rotatably installed in the groove 2-1 of two pillar 2 upper ends; The top of wind 5 along the circumferential direction evenly has four through hole 5-1; Wind 5 is packed in an end of cylinder rotor 3, and fixed bar 6 is located on the through hole 5-1 and pillar 2 of wind 5 successively, along the circumferential direction evenly has a plurality of mounting hole 4-1 on the wheel hub 4; A plurality of concrete measurements take up device 7 and are packed in the mounting hole 4-1 of wheel hub 4; Each concrete measurement takes up device 7 and includes loam cake 8, lower cover 9, taper type container 10, two sensors 11 and two steel discs 12, and taper type container 10 is the stainless steel taper type container of inner wall smooth, fills up fresh concrete in the taper type container 10; The center of loam cake 8 and lower cover 9 all has a center pit; And loam cake 8 covers the two ends up and down that are contained in taper type container 10 respectively with lower cover 9, each pre-buried steel disc 12 of the two ends up and down of fresh concrete, and the center pit of the position of steel disc 12 and loam cake 8 and lower cover 9 is relative; Two sensors 11 wear respectively and are packed on loam cake 8 and the lower cover 9; Each sensor 11 all center pit with loam cake 8 and lower cover 9 is relative, and leaves the gap between each steel disc 12 and each sensor 11, and sensor 11 is an eddy displacement sensor.
Embodiment two: combine Fig. 2 that this embodiment is described, the quantity that the concrete measurement of this embodiment takes up device 7 is 2,4 or 6.So be provided with, be convenient to simultaneously a plurality of concrete measurements to be taken up device and measure.Other composition is identical with embodiment one with annexation.
Embodiment three: combine Fig. 2 and Fig. 3 that this embodiment is described, the in the vertical direction of this embodiment, the concrete measurement take up device 7 taper type container 10 small end all straight up.So be provided with, be convenient to the condensing measurement of concrete and reduce of the influence of taper turret vessel sidewall friction power concrete shrinkage.Other composition is identical with embodiment one or two with annexation.
Embodiment four: combine Fig. 2 that this embodiment is described; The self-constriction measurement mechanism of this embodiment also comprises many group fixed mounts 13; Fixed mount 13 is hooked on the taper type container 10 and is packed on the wheel hub 4, and the quantity of fixed mount 13 is identical with the quantity that the concrete measurement takes up device 7.So be provided with, be convenient to more firm a plurality of concrete measurements are taken up device fix.Other composition is identical with embodiment three with annexation.
The course of work of the present invention is:
In the taper type container, fill up fresh concrete, earlier one or two taper type container of adjustment is vertical position, the large diameter bottom of taper type container below, the top of minor diameter is up.Gap between adjustment eddy displacement sensor and the steel disc is with the voltage signal input instrument or the computing machine of eddy displacement sensor output.Concrete keeps the vertical transfixion of taper type container in the plastic stage always, and the variation in the gap between measured sensor of eddy displacement sensor and the steel disc is concrete condensing at this moment.After the concrete initial set, the taper type container can regularly overturn (0 degree, 90 degree or 180 degree) according to CW, when not measuring; The taper type container can keep horizontal positioned; During measurement, the taper type container is vertical position, and guarantees the little termination of diameter up; At this moment, measured concrete deformation is the self-constriction behind the setting and harden.The measured concrete self-constriction of this device utilizes same test specimen, same measurement mechanism, from concrete formation constantly, realizes the measurement of concrete self-constriction (comprising the condensing of plastic stage).
Claims (4)
1. hub-type concrete self-constriction measurement mechanism; It comprises base (1) and two pillars (2); The upper end of each pillar (2) all has groove (2-1), and two pillars (2) are parallel to be packed on the base (1), it is characterized in that: said hub-type concrete self-constriction measurement mechanism comprises that also cylinder rotor (3), wheel hub (4), wind (5), fixed bar (6) and a plurality of concrete measurement take up device (7); Wheel hub (4) is fixedly set on the cylinder rotor (3); Cylinder rotor (3) is rotatably installed in the groove (2-1) of two pillars (2) upper end, and the top of wind (5) along the circumferential direction evenly has four through holes (5-1), and wind (5) is packed in an end of cylinder rotor (3); Fixed bar (6) is located on the through hole (5-1) and pillar (2) of wind (5) successively; Along the circumferential direction evenly have a plurality of mounting holes (4-1) on the wheel hub (4), a plurality of concrete measurements take up device (7) and are packed in the mounting hole (4-1) of wheel hub (4), and each concrete measurement takes up device (7) and includes loam cake (8), lower cover (9), taper type container (10), two sensors (11) and two steel discs (12); Taper type container (10) is the stainless steel taper type container of inner wall smooth; The taper type container fills up fresh concrete in (10), and the center of loam cake (8) and lower cover (9) all has a center pit, and loam cake (8) and lower cover (9) cover the two ends up and down that are contained in taper type container (10) respectively; Each pre-buried steel disc (12) of the two ends up and down of fresh concrete; And the center pit of the position of steel disc (12) and loam cake (8) and lower cover (9) is relative, and two sensors (11) wear respectively and are packed on loam cake (8) and the lower cover (9), and each sensor (11) all center pit with loam cake (8) and lower cover (9) is relative; And leave the gap between each steel disc (12) and each sensor (11), sensor (11) is an eddy displacement sensor.
2. according to the said hub-type concrete of claim 1 self-constriction measurement mechanism, it is characterized in that: the quantity that the concrete measurement takes up device (7) is 2,4 or 6.
3. according to the said hub-type concrete of claim 2 self-constriction measurement mechanism, it is characterized in that: in the vertical direction, concrete measurement take up device (7) taper type container (10) small end all straight up.
4. according to claim 1 or 3 said hub-type concrete self-constriction measurement mechanisms; It is characterized in that: said self-constriction measurement mechanism also comprises many group fixed mounts (13); Fixed mount (13) is hooked on taper type container (10) and goes up and be packed on the wheel hub (4), and the quantity of fixed mount (13) is identical with the quantity that the concrete measurement takes up device (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100498179A CN102589408B (en) | 2012-02-29 | 2012-02-29 | Hub type concrete self-shrinkage measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100498179A CN102589408B (en) | 2012-02-29 | 2012-02-29 | Hub type concrete self-shrinkage measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102589408A true CN102589408A (en) | 2012-07-18 |
| CN102589408B CN102589408B (en) | 2013-11-27 |
Family
ID=46478405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100498179A Expired - Fee Related CN102589408B (en) | 2012-02-29 | 2012-02-29 | Hub type concrete self-shrinkage measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102589408B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717283A (en) * | 2016-01-28 | 2016-06-29 | 山东大学 | Cement mortar drying shrinkage testing frame and testing method |
| CN109856374A (en) * | 2018-12-26 | 2019-06-07 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of concrete self-shrinkage test method |
| CN110187084A (en) * | 2019-06-14 | 2019-08-30 | 舟山道隆科技有限公司 | Concrete early age shrinkage deformation characteristic measuring method |
| CN112857299A (en) * | 2020-12-30 | 2021-05-28 | 江苏法尔胜光电科技有限公司 | Mounting method of displacement sensor for tunnel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001324302A (en) * | 2000-05-15 | 2001-11-22 | Kyowa Electron Instr Co Ltd | Concrete embedded type strain gage and method for measuring strain of concrete |
| CN200979544Y (en) * | 2006-11-03 | 2007-11-21 | 北京工业大学 | A cement concrete autogenous-shrinkage ratio detector |
| JP2009020081A (en) * | 2007-07-14 | 2009-01-29 | Bridgestone Corp | Deformation measuring method and deformation measuring device |
| CN201307097Y (en) * | 2008-07-01 | 2009-09-09 | 舟山市博远科技开发有限公司 | Testing device for early age shrinkage performance test of concrete in eddy current method |
-
2012
- 2012-02-29 CN CN2012100498179A patent/CN102589408B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001324302A (en) * | 2000-05-15 | 2001-11-22 | Kyowa Electron Instr Co Ltd | Concrete embedded type strain gage and method for measuring strain of concrete |
| CN200979544Y (en) * | 2006-11-03 | 2007-11-21 | 北京工业大学 | A cement concrete autogenous-shrinkage ratio detector |
| JP2009020081A (en) * | 2007-07-14 | 2009-01-29 | Bridgestone Corp | Deformation measuring method and deformation measuring device |
| CN201307097Y (en) * | 2008-07-01 | 2009-09-09 | 舟山市博远科技开发有限公司 | Testing device for early age shrinkage performance test of concrete in eddy current method |
Non-Patent Citations (3)
| Title |
|---|
| 巴恒静等: "高性能混凝土早期自收缩测试方法研究", 《工业建筑》 * |
| 田倩等: "高性能混凝土自收缩测试方法探讨", 《建筑材料学报》 * |
| 祝瑜等: "混凝土自收缩测量方法的进展", 《低温建筑技术》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717283A (en) * | 2016-01-28 | 2016-06-29 | 山东大学 | Cement mortar drying shrinkage testing frame and testing method |
| CN109856374A (en) * | 2018-12-26 | 2019-06-07 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of concrete self-shrinkage test method |
| CN109856374B (en) * | 2018-12-26 | 2022-02-22 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Concrete self-shrinkage test method |
| CN110187084A (en) * | 2019-06-14 | 2019-08-30 | 舟山道隆科技有限公司 | Concrete early age shrinkage deformation characteristic measuring method |
| CN112857299A (en) * | 2020-12-30 | 2021-05-28 | 江苏法尔胜光电科技有限公司 | Mounting method of displacement sensor for tunnel |
| CN112857299B (en) * | 2020-12-30 | 2022-10-11 | 江苏法尔胜光电科技有限公司 | Mounting method of displacement sensor for tunnel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102589408B (en) | 2013-11-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102589408B (en) | Hub type concrete self-shrinkage measuring device | |
| CN104359391B (en) | Detecting device for reinforced concrete protective layer measurer and floor thickness measurer | |
| CN204165978U (en) | A kind of asphalt penetration test precise testing device | |
| CN205374449U (en) | Air shrinkage of concrete warp measuring device | |
| CN102175382B (en) | Detecting device for detecting lateral pressure of great-mobility concrete template | |
| CN203720173U (en) | Device for measuring self-contraction of cement-based material at early age | |
| CN106645649A (en) | Test apparatus for measuring volume change of carbon mudstone in disintegration process and test method of test apparatus | |
| CN201555657U (en) | Weigher detecting and calibrating device | |
| CN101788291B (en) | Measuring device for aligning with continuous casting crystallizer | |
| CN1904573A (en) | Measuring mechanism used for measuring substance mass center, shape center and mass center deviation | |
| CN102608298B (en) | Hand-shaking type concrete self-constriction measuring device | |
| CN102590485B (en) | Framework-type concrete self-constriction measurement device | |
| CN112345740A (en) | Positioning device for measuring concrete expansion and contraction deformation by non-contact method | |
| CN202928479U (en) | Dimension measuring device | |
| CN104089593A (en) | Device capable of measuring polar coordinates | |
| CN102323397B (en) | Measurement method of concrete crack risk evaluation index | |
| CN204925120U (en) | Vertical expansion rate apparatus of grouting material | |
| CN204115641U (en) | Crank phase angle detection device | |
| RO129259A2 (en) | Method and apparatus for measuring and studying surface tension of liquids | |
| CN201449362U (en) | Asphalt mixture measuring instrument | |
| CN205027748U (en) | Concrete confined expansion rate normal position measuring device | |
| CN209230515U (en) | Reinforcing bar scanning and slab thickness calibrating installation | |
| CN102095585A (en) | Total thrust measurement device of attitude control engine | |
| CN209311477U (en) | A kind of road steel-slag mixture expansion rate tester | |
| CN2932354Y (en) | A mechanism for measurement of centroid, figure center and centroid offset |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU JINLING CONSTRUCTION ENGINEERING GROUP CO. Effective date: 20121109 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yang Yingzi Inventor after: Fan Guangfeng Inventor after: Tang Shibing Inventor after: Ding Guangming Inventor before: Yang Yingzi |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: YANG YINGZI TO: YANG YINGZI FAN GUANGFENG TANG SHIBING DING GUANGMING |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20121109 Address after: 150001 Harbin, Nangang, West District, large straight street, No. 92 Applicant after: Harbin Institute of Technology Applicant after: Jiangsu Jinling Construction Engineering Group Co., Ltd. Address before: 150001 Harbin, Nangang, West District, large straight street, No. 92 Applicant before: Harbin Institute of Technology |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131127 Termination date: 20170229 |