CN101424681A - Wind speed adjustable novel concrete shrinkage test system - Google Patents
Wind speed adjustable novel concrete shrinkage test system Download PDFInfo
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- CN101424681A CN101424681A CNA200810204462XA CN200810204462A CN101424681A CN 101424681 A CN101424681 A CN 101424681A CN A200810204462X A CNA200810204462X A CN A200810204462XA CN 200810204462 A CN200810204462 A CN 200810204462A CN 101424681 A CN101424681 A CN 101424681A
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Abstract
The invention relates to a novel concrete shrinkage test system with adjustable wind speed, which comprises a concrete shrinkage tester and a wind channel with the function of controlling and adjusting the wind speed, wherein the wind channel is covered above the tester and is fixedly connected with a frame of the tester; and the wind channel comprises a regulating system for regulating the stability of a flow field, a dynamic system for generating wind power and regulating the wind speed and a wind speed test system for testing the wind speed. The regulating system comprises a wind field ceiling and a damping net; the dynamic system comprises an electric motor, a fan and a wind speed regulator; and the wind speed test system has the technical proposal that a pitot tube penetrates out from a preset hollow space on the wind field ceiling, one end of the pitot tube is used for testing the wind speed in the wind channel, and the other end is connected with a data collection system. The tester can test the restrained contraction performance of concrete acted by the environmental wind field and has the advantages of easy operation and convenient execution.
Description
Technical field
The invention belongs to building industry, instrument field, relate to the adjustable concrete shrinkage test system of a kind of concrete test system, especially wind speed.
Background technology
Cast-in-place concrete is a kind of moisture porosint, and the new system concrete can dehydration produce dry the contraction under wind action.In the concrete material performance test, how to simulate member externally under the influence of ambient wind, the constraint shrinkage cracking is an important and real problem.In actual building operation, concrete finishes to final set from building, and is carrying out the exchange of temperature, humidity all the time with external environment, and environmental baseline has produced the effect that is difficult to ignore to concrete early stage performance.Special in the early stage drawdown deformation performance of concrete, because flowing of component surface wind accelerated scattering and disappearing of concrete surface moisture, and then increased contraction rate, this has just caused the inharmonious of distortion and drag development, has aggravated the danger of cracking.Therefore, in order to test the effect of wind speed, need relate to a kind of corresponding instrumentation it is tested the dry distortion of concrete.
Summary of the invention
The object of the present invention is to provide the adjustable novel concrete shrinkage test system of a kind of wind speed, be used to test the dry shrinkage degree of coagulation great soil group sample under the moving air effect.
For reaching above purpose, solution of the present invention is:
On original contraction test frame, build an artificial small-sized wind-tunnel, build the artificial wind field that a wind speed can be regulated control.Original concrete shrinkage test macro is still kept, and the present invention will carry out process and remould on this system-based.The novel concrete shrinkage test system that a kind of wind speed is adjustable, it comprises the concrete shrinkage tester, the wind-tunnel that also comprises the controllable adjustable wind speed, wind-tunnel is covered in the tester top, be connected and fixed with the framework of tester, this wind-tunnel comprise adjust the flow field stably regulating system, produce wind-force and regulate the power system of wind speed and the wind speed test macro of test wind speed.
This regulating system comprises wind field ceiling, damping screen, and wind field ceiling two ends are the enlarging type, and it is connected and fixed on the framework of tester; Damping screen is installed on ceiling enlarging place of air inlet end.
This damping screen is provided with three layers, by glue and the adhesion of air inlet end.
This damping screen adopts pmma material to make.
This wind field ceiling adopts organic glass to make, and its xsect is semicircle.
This wind field ceiling is connected with the bolt of framework by ceiling flank place.
This power system comprises motor, fan and wind speed regulator, and fan is installed on wind field ceiling enlarging place of air opening end, and the coupled and control of motor also is provided with the wind speed regulator on the fan.
This wind speed test macro is a pitot tube, passes by the cavity of reserving on the wind field ceiling, and the size of wind speed in the wind-tunnel is surveyed in a looking somebody up and down, and an end links to each other with data acquisition system (DAS).
Owing to adopted such scheme, the present invention to have following characteristics: tester of the present invention can be tested concrete and retrain shrinkage under the surroundings wind field effect, and this tester easy operating, and it is convenient to implement.
Description of drawings
Fig. 1 is the structural representation one of the embodiment of the invention.
Fig. 2 is the structural representation two of the embodiment of the invention.
Fig. 3 is the vertical view of the embodiment of the invention.
Fig. 4 is the synoptic diagram of original shrinkage test instrument.
Fig. 5 is the artificial wind field synoptic diagram of the embodiment of the invention
Label declaration in the accompanying drawing:
1. original shrinkage test instrument framework 2. artificial wind field ceilings
3. fan 4. hygrometers
5. pitot tube 6. damping screens
7. wind speed by-pass cock 8. displacement meters
9. coupling bolt
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawing illustrated embodiment.
A kind of small-sized wind-tunnel of controllable adjustable wind speed comprises power system, regulating system and wind speed proving installation; One cover can realize that humidity changes in the real-time monitored novel concrete test specimen, the test macro of drying shrinkage deformation.
Power system comprises motor, fan 3 and wind speed regulator 7;
Regulating system comprises wind field ceiling 2 and damping screen 6;
Damping screen 6 is located at pipe die air inlet one end, establishes three layers altogether, and purpose is filtered air, and makes even, mild the entering in the pipeline section of air-flow.Damping screen 6 adopts pmma material, bonds together by glue and pipe die air inlet one end.
The wind speed proving installation is a pitot tube 5, passes by the cavity of reserving on the wind field ceiling 2, and the size of wind speed in the wind-tunnel is surveyed in a looking somebody up and down, and an end links to each other with data acquisition system (DAS);
Humidity changes and the drawdown deformation test macro comprises hygrometer 4, high precision displacement meter 8 and signal receiving device, and this signal receiving device is a data collecting cassette, links to each other with computer by Serial Port Line.The humidity measurement precision can reach ± 2%RH, shrinks measuring accuracy and can reach 1 μ m.
When test is carried out, at first on original constraint retractometer 1, carry out the cast of concrete sample.Treat after the form removal, bury Temperature Humidity Sensor (Temperature Humidity Sensor is embedded in the concrete, can place every 10cm in test specimen center line one side) underground when test specimen is built, and place displacement meter at the test specimen two ends.After connecting data acquisition system (DAS), predict that check displacement meter and Temperature Humidity Sensor be operate as normal whether.
Set up ceiling 2, after having good positioning, tighten the bolt 9 at ceiling flank place.After ceiling sets up and finishes, fan 3 is installed, at the air outlet place, two bolts by the bottom connect together with firm framework.After treating that recording geometry wiring debugging is finished, start fan 3, wind speed is adjusted to pre-sizing, can test by control handle 7.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (8)
1, a kind of concrete shrinkage test system, it comprises the concrete shrinkage tester, it is characterized in that: the wind-tunnel that also comprises the controllable adjustable wind speed, wind-tunnel is covered in the tester top, be connected and fixed with the framework of tester, this wind-tunnel comprise adjust the flow field stably regulating system, produce wind-force and regulate the power system of wind speed and the wind speed test macro of test wind speed.
2, concrete shrinkage test system according to claim 1 is characterized in that: this regulating system comprises wind field ceiling, damping screen, and wind field ceiling two ends are the enlarging type, and it is connected and fixed on the framework of tester; Damping screen is installed on ceiling enlarging place of air inlet end.
3, concrete shrinkage test system according to claim 2 is characterized in that: this damping screen is provided with three layers, by glue and the adhesion of air inlet end.
4, concrete shrinkage test system according to claim 2 is characterized in that: this damping screen adopts pmma material to make.
5, concrete shrinkage test system according to claim 2 is characterized in that: this wind field ceiling adopts organic glass to make, and its xsect is semicircle.
6, concrete shrinkage test system according to claim 2 is characterized in that: this wind field ceiling is connected with the bolt of framework by ceiling flank place.
7, concrete shrinkage test system according to claim 1, it is characterized in that: this power system comprises motor, fan and wind speed regulator, fan is installed on wind field ceiling enlarging place of air opening end, and the coupled and control of motor also is provided with the wind speed regulator on the fan.
8, concrete shrinkage test system according to claim 1 is characterized in that: this wind speed test macro is a pitot tube, passes by the cavity of reserving on the wind field ceiling, and the size of wind speed in the wind-tunnel is surveyed in a looking somebody up and down, and an end links to each other with data acquisition system (DAS).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810204462XA CN101424681A (en) | 2008-12-12 | 2008-12-12 | Wind speed adjustable novel concrete shrinkage test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810204462XA CN101424681A (en) | 2008-12-12 | 2008-12-12 | Wind speed adjustable novel concrete shrinkage test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101424681A true CN101424681A (en) | 2009-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNA200810204462XA Pending CN101424681A (en) | 2008-12-12 | 2008-12-12 | Wind speed adjustable novel concrete shrinkage test system |
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| CN (1) | CN101424681A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621293A (en) * | 2012-03-29 | 2012-08-01 | 吉林省交通科学研究所 | Test instrument for shrinkage deformation of pavement semi-rigid material |
| CN102798707A (en) * | 2012-09-09 | 2012-11-28 | 中国水利水电第三工程局有限公司 | Concrete restrained contraction ring crack resistance test device and test method |
| CN104359645A (en) * | 2014-10-17 | 2015-02-18 | 北京航天益森风洞工程技术有限公司 | Fastening device for damping net at stilling chamber of wind tunnel |
| CN107020687A (en) * | 2017-04-21 | 2017-08-08 | 河海大学 | Three regulatable storage concrete curing systems of wind speed temperature humidity and method |
| WO2023161676A1 (en) * | 2022-02-28 | 2023-08-31 | Escuela Superior Politécnica Del Litoral Espol | Wind tunnel for analysing cracks in concrete under different environmental parameters |
-
2008
- 2008-12-12 CN CNA200810204462XA patent/CN101424681A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621293A (en) * | 2012-03-29 | 2012-08-01 | 吉林省交通科学研究所 | Test instrument for shrinkage deformation of pavement semi-rigid material |
| CN102798707A (en) * | 2012-09-09 | 2012-11-28 | 中国水利水电第三工程局有限公司 | Concrete restrained contraction ring crack resistance test device and test method |
| CN102798707B (en) * | 2012-09-09 | 2014-08-13 | 中国水利水电第三工程局有限公司 | Concrete restrained contraction ring crack resistance test device and test method |
| CN104359645A (en) * | 2014-10-17 | 2015-02-18 | 北京航天益森风洞工程技术有限公司 | Fastening device for damping net at stilling chamber of wind tunnel |
| CN107020687A (en) * | 2017-04-21 | 2017-08-08 | 河海大学 | Three regulatable storage concrete curing systems of wind speed temperature humidity and method |
| CN107020687B (en) * | 2017-04-21 | 2018-03-20 | 河海大学 | Three regulatable storage concrete curing systems of wind speed temperature humidity and method |
| WO2023161676A1 (en) * | 2022-02-28 | 2023-08-31 | Escuela Superior Politécnica Del Litoral Espol | Wind tunnel for analysing cracks in concrete under different environmental parameters |
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Owner name: SHANGHAI TONGJI INSTITUTION OF INSPECTION ON CONST Free format text: FORMER OWNER: TONGJI UNIVERSITY Effective date: 20110926 |
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Free format text: CORRECT: ADDRESS; FROM: 200092 YANGPU, SHANGHAI TO: 200092 HONGKOU, SHANGHAI |
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Effective date of registration: 20110926 Address after: 200092 No. 281, Fuxin Road, Shanghai Applicant after: SHANGHAI TONGJI CONSTRUCTION QUALITY INSPECTION STATION Address before: 200092 Shanghai City, Yangpu District Siping Road No. 1239 Applicant before: Tongji University |
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Open date: 20090506 |