CN201583525U - Ultrasonic device for real-time monitoring over early shrinkage of concrete - Google Patents
Ultrasonic device for real-time monitoring over early shrinkage of concrete Download PDFInfo
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- CN201583525U CN201583525U CN2009202828567U CN200920282856U CN201583525U CN 201583525 U CN201583525 U CN 201583525U CN 2009202828567 U CN2009202828567 U CN 2009202828567U CN 200920282856 U CN200920282856 U CN 200920282856U CN 201583525 U CN201583525 U CN 201583525U
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- ultrasound wave
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Abstract
The utility model discloses an ultrasonic device for real-time monitoring over early shrinkage of concrete, which has high measurement accuracy and low cost. The ultrasonic device comprises a concrete mould, a water tank, a hollow pipe, a fixed rack, an ultrasonic sensing probe and a data acquisition and processing device, wherein the water tank is arranged on the upper surface of the concrete filled in the concrete mould; a liquid A and a liquid B which are non-homogenous are filled in the water tank, thereby forming an interface between the two types of liquids; the ultrasonic sensing probe is electrically connected with the data acquisition and processing device through a lead, and is positioned and encapsulated in the cavity of the upper part of the hollow pipe via encapsulation glue; the lower part of the hollow pipe is inserted into the liquid A, is positioned by the fixed rack and is fully filled with liquid A; and the lower end of the hollow pipe is positioned above the interface.
Description
Technical field
The utility model relates to a kind of concrete shrinkage supervising device, relates in particular to the early stage ultrasound wave real time monitoring apparatus that shrinks of monitoring concrete.
Background technology
Concrete is to use the widest construction material now, and it has extremely important basic role in building trade.But the service life in concrete serviceable life, particularly xoncrete structure closely links to each other with its cracking resistance.Concrete cracking resistance depends on several factors, and concrete volume stability just belongs to one of them.The factor that influences volume stability of concrete is also a lot, and concrete early-age plastic shrinkage, chemical shrinkage, drying shrinkage and self-constriction etc. all can cause the volume of concrete distortion, and then cause concrete cracking.Therefore, test and the monitoring to concrete shrinkage just becomes engineering circle urgent problem.
The domestic and international at present method of testing to concrete shrinkage and cracking mainly contains flat band method and ring method.Flat band method mainly is the cracking that causes owing to plastic shrinkage in early days of test concrete, and ring method mainly is to test after the concrete hardening contraction and the cracking that causes owing to drying shrinkage and self-constriction.Though flat band method and ring method can more concrete cracking resistances, they but can not concrete contraction of actual response and cracking resistance.And in the existing standard method of testing of the various contractions of concrete mainly being concentrated on contraction after the concrete hardening, it is still immature that this class testing method is used for the contraction of early early stage plastic stage of concrete.Concrete is still rare in the domestic research of contraction of early stage plastic stage, but does not represent it inessential.Along with the application of high-strength high-performance concrete and mass concrete, it is more and more higher that concrete accounts for concrete total contraction in the contraction of early stage plastic stage early, become the very important factor that influences volume stability.Consider concrete volume change and the method that existing test concrete plastic stage shrinks is many from macroscopic view, and do not set about from the factor that influence the early stage plastic shrinkage of concrete, thus can not the actual response concrete in early stage contraction morning.Therefore it is extremely urgent in the contraction of early stage plastic stage to seek efficient ways monitoring concrete.
The early stage monitoring of shrinking of concrete mainly faces following difficult point: 1, concrete early is being in the plastic stage in early days, therefore there are not suitable means of testing and method that it is tested, the inapplicable unhardened concrete of method of testing of the sort of sclerosis back contact; 2, concrete is in the process of being hardened gradually by mecystasis in early days, process is ofer short duration, basically just lose plasticity fully at twenty four hours, especially in mix begins back three hour time, the variation of mecystasis is very violent, therefore need in the so of short duration time, monitor, test frequency and precision have been proposed challenge; 3, concrete is in the early stage contraction that is punctured on the volume early, how to embody early stage various factors to the influence of concrete shrinkage and authentic and valid reflection concrete is early stage shrinks mould and appraisement system that this just need be suitable comprehensively.
The utility model content
Technical problem to be solved in the utility model provides a kind of measuring accuracy height, the early stage ultrasound wave real time monitoring apparatus that shrinks of the concrete that cost is low.
The utility model comprises concrete mold, tank, hollow tubular, fixed mount, ultrasound wave sensing probe and data acquisition and treating apparatus; Above-mentioned tank is arranged on the concrete upper surface that is poured in the concrete mold; In described tank, arrange two kinds of immiscible first liquid and second liquid, thereby between two kinds of liquid, form an interphase; Described ultrasound wave sensing probe is electrically connected with described data acquisition and treating apparatus by lead; Described ultrasound wave sensing probe places the tube chamber of hollow tubular, is encapsulated in by means of packaging plastic in the top tube chamber of described hollow tubular; The bottom of described hollow tubular is inserted in the first liquid, is located by the said fixing frame; Be full of first liquid in the bottom tube chamber of described hollow tubular, the lower end of described hollow tubular is in above-mentioned interfacial top.
Ultrasound wave real time monitoring apparatus in the utility model is by the composite design of hollow tubular and tank, utilize ultrasound wave velocity of propagation in liquid big, and the interface of two kinds of liquid has the characteristic of excellent horizontality, high-precision ultrasonic investigation technology is applied to the early stage monitoring of shrinking of concrete, has low cost, characteristics such as high precision.In monitor procedure, its upper surface descends during concrete shrinkage, and this moment, tank also descended thereupon.Because hollow tubular is positioned at certain position by fixed mount, so the distance between the interphase of ultrasound wave sensing probe and two kinds of liquid changes, the ultrasound wave sensing probe can constantly be monitored the variable in distance of itself and two kinds of liquid surfaces, the shrinkage value in the reflection a certain moment of concrete.Data acquisition and treating apparatus are controlled the emission and the collection analysis of ultrasonic signal in real time, realized the intellectuality and the robotization of early stage real-time monitoring of shrinking of concrete and monitoring overall process thus, reflected the contraction of concrete truely and accurately in the early early stage stage.
Preferably, described first liquid is absolute ethyl alcohol or water, and described second liquid is mercury.
Figure of description
Fig. 1 is the early stage structural representation that shrinks the ultrasound wave real time monitoring apparatus of concrete;
Fig. 2 is the structure for amplifying synoptic diagram of A among Fig. 1.
Embodiment
As depicted in figs. 1 and 2, the early stage ultrasound wave real time monitoring apparatus that shrinks of the concrete in the present embodiment comprises concrete mold 1, tank 2, hollow tubular 3, fixed mount 4, ultrasound wave sensing probe 5, data acquisition and treating apparatus 6.
Inject two kinds of immiscible first liquid 8 and second liquid 9 in the tank 2, thereby between two kinds of liquid, form an interphase 10.Preferably, described first liquid 8 is absolute ethyl alcohol or water, and described second liquid 9 is mercury.
Described ultrasound wave sensing probe 5 places the tube chamber of hollow tubular 3, is encapsulated in by means of packaging plastic 11 in the top tube chamber of described hollow tubular 3.The bottom of described hollow tubular 3 is inserted in the first liquid 8, by fixed mount 4 location.In the tube chamber of the bottom of described hollow tubular 3, be full of first liquid 8, and the lower end of described hollow tubular 3 is in the top of above-mentioned interphase 10.
Described ultrasound wave sensing probe 5 is electrically connected with data acquisition and treating apparatus 6 by lead 12.
Claims (2)
1. the early stage ultrasound wave real time monitoring apparatus that shrinks of concrete is characterized in that: comprise concrete mold, tank, hollow tubular, fixed mount, ultrasound wave sensing probe and data acquisition and treating apparatus; Above-mentioned tank is arranged on the concrete upper surface that is poured in the concrete mold; In described tank, arrange two kinds of immiscible first liquid and second liquid, thereby between two kinds of liquid, form an interphase; Described ultrasound wave sensing probe is electrically connected with described data acquisition and treating apparatus by lead; Described ultrasound wave sensing probe places the tube chamber of hollow tubular, is encapsulated in by means of packaging plastic in the top tube chamber of described hollow tubular; The bottom of described hollow tubular is inserted in the first liquid, is located by the said fixing frame; Be full of first liquid in the bottom tube chamber of described hollow tubular, the lower end of described hollow tubular is in above-mentioned interfacial top.
2. the early stage ultrasound wave real time monitoring apparatus that shrinks of concrete according to claim 1, it is characterized in that: described first liquid is absolute ethyl alcohol or water, described second liquid is mercury.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202828567U CN201583525U (en) | 2009-12-24 | 2009-12-24 | Ultrasonic device for real-time monitoring over early shrinkage of concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202828567U CN201583525U (en) | 2009-12-24 | 2009-12-24 | Ultrasonic device for real-time monitoring over early shrinkage of concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201583525U true CN201583525U (en) | 2010-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202828567U Expired - Fee Related CN201583525U (en) | 2009-12-24 | 2009-12-24 | Ultrasonic device for real-time monitoring over early shrinkage of concrete |
Country Status (1)
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| CN (1) | CN201583525U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175194A (en) * | 2011-02-16 | 2011-09-07 | 河海大学 | Ultrasonic horizontal displacement monitor |
| TWI492780B (en) * | 2011-03-25 | 2015-07-21 | Albemarle Corp | Compositions and methods to sequester flue gas mercury in concrete |
-
2009
- 2009-12-24 CN CN2009202828567U patent/CN201583525U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175194A (en) * | 2011-02-16 | 2011-09-07 | 河海大学 | Ultrasonic horizontal displacement monitor |
| CN102175194B (en) * | 2011-02-16 | 2012-07-25 | 河海大学 | Ultrasonic horizontal displacement monitor |
| TWI492780B (en) * | 2011-03-25 | 2015-07-21 | Albemarle Corp | Compositions and methods to sequester flue gas mercury in concrete |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20121224 |