CN203881765U - Concrete self-contraction measuring device - Google Patents
Concrete self-contraction measuring device Download PDFInfo
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- CN203881765U CN203881765U CN201420280236.0U CN201420280236U CN203881765U CN 203881765 U CN203881765 U CN 203881765U CN 201420280236 U CN201420280236 U CN 201420280236U CN 203881765 U CN203881765 U CN 203881765U
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Abstract
The utility model discloses a concrete self-contraction measuring device which comprises a concrete sample, embedded screws, a magnetic gauge stand, a displacement sensor, a channel steel chassis, a teflon plate and a thermocouple, wherein the concrete sample is arranged on the channel steel chassis; the magnetic gauge stand is arranged on the outer side of the concrete sample; the displacement sensor is arranged on the magnetic gauge stand; the embedded screws are arranged on the two sides of the concrete sample; the thermocouple is arranged in the concrete sample; the outer side of the embedded screw is in contact with a measuring head of the displacement sensor; a test die on the outer layer of the concrete sample is lined with the teflon plate. The device disclosed by the utility model is simple in structure and accurate in measurement and provides a theoretical basis for comprehensively evaluating the cracking behavior of a practical concrete structure.
Description
Technical field
The utility model relates to a kind of measurement mechanism, be specifically related to a kind of concrete self-shrinkage measuring device.
Background technology
The early stage cracking of cast-in-place concrete is the comparatively general phenomenon existing in engineering.In recent years, along with the widespread use of high-strength high-performance concrete, promoted the development of concrete technology, but the problem of Cracking that early deformation causes is not well controlled and solves, increase even to some extent.Therefore, how to reduce concrete autogenous shrinkage, particularly early-age shrinkage and become the key that reduces crack and improve works permanance.
For the concrete of regular tenacity, because its water-cement ratio is larger, the consumption of consolidating material is little, and the self-constriction of therefore following consolidating material aquation process to occur is also not obvious.And for high-strength concrete, self-constriction can not be left in the basket, under the restrained condition of distortion, self-constriction is the main cause that causes the early stage cracking of concrete with dry contraction, temperature deformation equally, or even prior reason.At present, for the measurement of high-strength concrete self-constriction, there is no unified standard can comply with, and different researchers adopt diverse ways according to physical condition.Selected datum length starts while having plenty of from initial set (or final set) to measure, and while also having from concrete formation 1d, starts to measure.In addition, the measuring method adopting is different, as clock gauge method, sensor method, optical measuring method and volumetric method etc.Therefore be necessary to design a kind of concrete self-shrinkage measuring device.
Utility model content
For the deficiency existing in prior art, the utility model object is to be to provide a kind of concrete self-shrinkage measuring device, simple in structure, measures accurately, for the cracking behaviors of the actual xoncrete structure of comprehensive evaluation provides theoretical foundation.
To achieve these goals, the utility model is to realize by the following technical solutions: a kind of concrete self-shrinkage measuring device, comprise concrete sample, pre embedded bolt, Magnetic gauge stand, displacement transducer, channel-section steel chassis, special Furon plate and thermopair, channel-section steel is provided with concrete sample on chassis, the concrete sample arranged outside gauge stand that is magnetic, on Magnetic gauge stand, be provided with displacement transducer, concrete sample both sides are provided with pre embedded bolt, concrete sample inside is provided with thermopair, and pre embedded bolt outside contacts with the measuring head of displacement transducer; In the outer field die trial of described concrete sample, be lined with special Furon plate.
As preferably, described die trial is frame plate structure, seals fixing by set bolt.
As preferably, the concrete in described concrete sample is wrapped with insulation film and froth bed.
The utility model is simple in structure, measures accurately, for the cracking behaviors of the actual xoncrete structure of comprehensive evaluation provides theoretical foundation.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, describe the utility model in detail;
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of die trial of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with embodiment, further set forth the utility model.
With reference to Fig. 1-2, this embodiment is by the following technical solutions: a kind of concrete self-shrinkage measuring device, comprise concrete sample 1, pre embedded bolt 2, Magnetic gauge stand 3, displacement transducer 4, channel-section steel chassis 5, special Furon plate 6 and thermopair 7, on channel-section steel chassis 5, be provided with concrete sample 1, the concrete sample 1 arranged outside gauge stand 3 that is magnetic, on Magnetic gauge stand 3, be provided with displacement transducer 4, concrete sample 1 both sides are provided with pre embedded bolt 2, concrete sample 1 inside is provided with thermopair 7, and pre embedded bolt 2 outsides contact with the measuring head of displacement transducer 4; In the outer field die trial 8 of described concrete sample 1, be lined with special Furon plate 6.
It should be noted that described die trial 8 is for frame plate structure, fixing by set bolt 9 sealings.
In addition, the concrete in described concrete sample 1 is wrapped with insulation film and froth bed.
This embodiment adopts the test specimen that is of a size of 100mm * 100mm * 400mm, the starting point that the measurement start time undergos mutation with the reinforcing bar strain in reinforced binding test specimen, and the starting point that stress occurs is benchmark.In order at utmost to reduce die trial to concrete effect of contraction, in concrete sealing die trial, end liner has the special Furon plate of 3mm, simultaneously in order to make concrete sample discord die trial contact, during concrete formation, at die trial side, be also provided with the special Furon plate of 3mm, constantly can pull out in initial set, do not damage concrete, the die trial good sealing effect of this embodiment, and fix with bolt, effect is fine.
This embodiment is simple in structure, measures accurately, for the cracking behaviors of the actual xoncrete structure of comprehensive evaluation provides theoretical foundation.
More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. a concrete self-shrinkage measuring device, it is characterized in that, comprise concrete sample (1), pre embedded bolt (2), Magnetic gauge stand (3), displacement transducer (4), channel-section steel chassis (5), special Furon plate (6) and thermopair (7), on channel-section steel chassis (5), be provided with concrete sample (1), concrete sample (1) the arranged outside gauge stand (3) that is magnetic, on Magnetic gauge stand (3), be provided with displacement transducer (4), concrete sample (1) both sides are provided with pre embedded bolt (2), concrete sample (1) inside is provided with thermopair (7), pre embedded bolt (2) outside contacts with the measuring head of displacement transducer (4), in the outer field die trial of described concrete sample (1) (8), be lined with special Furon plate (6).
2. a kind of concrete self-shrinkage measuring device according to claim 1, is characterized in that, described die trial (8) is frame plate structure, fixing by set bolt (9) sealing.
3. a kind of concrete self-shrinkage measuring device according to claim 1, is characterized in that, the concrete in described concrete sample (1) is wrapped with insulation film and froth bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420280236.0U CN203881765U (en) | 2014-05-25 | 2014-05-25 | Concrete self-contraction measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420280236.0U CN203881765U (en) | 2014-05-25 | 2014-05-25 | Concrete self-contraction measuring device |
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| CN203881765U true CN203881765U (en) | 2014-10-15 |
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| CN201420280236.0U Expired - Fee Related CN203881765U (en) | 2014-05-25 | 2014-05-25 | Concrete self-contraction measuring device |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107271648A (en) * | 2017-07-11 | 2017-10-20 | 中国京冶工程技术有限公司 | Consider the shrinkage stress measurement apparatus of concrete creep influence |
| CN108226217A (en) * | 2018-01-12 | 2018-06-29 | 上海市城市建设设计研究总院（集团）有限公司 | The concrete humiture and deflection experimental rig and application method of addition swelling agent |
| CN108931215A (en) * | 2018-07-27 | 2018-12-04 | 山东大学 | Concrete length measuring instrument and application 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 |
| CN109946440A (en) * | 2019-03-25 | 2019-06-28 | 广东工业大学 | A kind of measuring device and method of self-compacting concrete self-constriction amount |
| CN110043221A (en) * | 2019-05-31 | 2019-07-23 | 中国海洋石油集团有限公司 | A kind of device measuring cementing concrete ring microannulus |
| CN110080716A (en) * | 2019-05-31 | 2019-08-02 | 中国海洋石油集团有限公司 | A method of measurement cementing concrete ring microannulus and microdilatancy |
| CN110118868A (en) * | 2019-04-18 | 2019-08-13 | 广州建筑产业研究院有限公司 | A kind of experimental rig and its test method of grouting material expansion rate |
| CN110376049A (en) * | 2019-07-19 | 2019-10-25 | 东南大学 | A kind of temperature stress testing machine improving strain acquisition system |
| CN111122836A (en) * | 2020-01-16 | 2020-05-08 | 中铁第五勘察设计院集团有限公司 | Shrinkage value testing system, die system and shrinkage value testing method |
| CN112557635A (en) * | 2020-11-16 | 2021-03-26 | 东南大学 | Embedded reinforced cement-based material self-contraction measuring device and using method thereof |
-
2014
- 2014-05-25 CN CN201420280236.0U patent/CN203881765U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107271648A (en) * | 2017-07-11 | 2017-10-20 | 中国京冶工程技术有限公司 | Consider the shrinkage stress measurement apparatus of concrete creep influence |
| CN108226217A (en) * | 2018-01-12 | 2018-06-29 | 上海市城市建设设计研究总院（集团）有限公司 | The concrete humiture and deflection experimental rig and application method of addition swelling agent |
| CN108931215A (en) * | 2018-07-27 | 2018-12-04 | 山东大学 | Concrete length measuring instrument and application method |
| CN108931215B (en) * | 2018-07-27 | 2024-02-02 | 山东大学 | Concrete length measuring instrument and use method thereof |
| 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 |
| 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 |
| CN109946440A (en) * | 2019-03-25 | 2019-06-28 | 广东工业大学 | A kind of measuring device and method of self-compacting concrete self-constriction amount |
| CN110118868A (en) * | 2019-04-18 | 2019-08-13 | 广州建筑产业研究院有限公司 | A kind of experimental rig and its test method of grouting material expansion rate |
| CN110080716A (en) * | 2019-05-31 | 2019-08-02 | 中国海洋石油集团有限公司 | A method of measurement cementing concrete ring microannulus and microdilatancy |
| CN110043221A (en) * | 2019-05-31 | 2019-07-23 | 中国海洋石油集团有限公司 | A kind of device measuring cementing concrete ring microannulus |
| CN110376049A (en) * | 2019-07-19 | 2019-10-25 | 东南大学 | A kind of temperature stress testing machine improving strain acquisition system |
| CN111122836A (en) * | 2020-01-16 | 2020-05-08 | 中铁第五勘察设计院集团有限公司 | Shrinkage value testing system, die system and shrinkage value testing method |
| CN112557635A (en) * | 2020-11-16 | 2021-03-26 | 东南大学 | Embedded reinforced cement-based material self-contraction measuring device and using method thereof |
| CN112557635B (en) * | 2020-11-16 | 2023-10-27 | 东南大学 | Embedded reinforcement cement-based material self-shrinkage measuring device and application method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 Termination date: 20150525 |
|
| EXPY | Termination of patent right or utility model |