CN201707270U - Concrete spilt test rack - Google Patents
Concrete spilt test rack Download PDFInfo
- Publication number
- CN201707270U CN201707270U CN2010202205253U CN201020220525U CN201707270U CN 201707270 U CN201707270 U CN 201707270U CN 2010202205253 U CN2010202205253 U CN 2010202205253U CN 201020220525 U CN201020220525 U CN 201020220525U CN 201707270 U CN201707270 U CN 201707270U
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- concrete
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- steel beam
- girder steel
- temperature
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The utility model discloses a concrete spilt test rack for detecting and evaluating the spilt sensitivity of the concrete, comprising a test main assembly on a test rack bearer, wherein the test main assembly comprises a concrete forming mold, a steel beam, a temperature sensor for measuring the temperature of the steel beam, a temperature sensor for measuring the temperature of the concrete test object and a strain gauge for measuring the telescoping and deforming of the steel beam and the concrete forming mold is formed by fixing four steel concave clampers, a clamper fixer and a concrete test-piece groove; one steel beam is respectively arranged on two sides of the concrete forming mold and stably connected with the concave clampers by a detachable low heat-conduction connection piece and a heating device is mounted on the steel beam. The concrete spilt test rack comprises the heating device and keeps the original length of the steel beam using the principles of thermal expansion and contraction and ensures the measurement accuracy of the shrinkage stress of the concrete test object at 100% constraint condition and also comprises a clamper head fixer finely solves the disassembly difficulty of the test piece and the detachable heat-conduction connection piece is added between the concrete and the steel beam to effectively prevent measurement error of the strain gauge on the steel beam.
Description
Technical field
The utility model relates to the test testing tool of building material field, especially a kind ofly is used to measure concrete occurrence temperature when distortion testing equipment of stress intensity under demi-inflation constraint condition and 100% pinch confinement condition respectively.
Background technology
Concrete temperature stress is to weigh concrete mix whether to help the direct important indicator that the large volume concrete structural thing reduces the cracking risk, use accurately, reliably, easily the concrete cracking test stand to measure temperature stress be to realize the correct precondition of judging.Mainly there are following three problems in the concrete cracking test stand of prior art:
The one, can not the concrete stress development of real simulation: in the concrete shrinkage stage, do not have heating system on two girder steels of former concrete cracking test stand, the constraint deficiency to the concrete test object can only reach 80% usually.
The 2nd, off-test dismounting trouble: available coagulation soil split test frame needs broken concrete test object wherein after test, can take out by piecemeal.
The 3rd, measuring error is bigger: available coagulation soil split test frame because therefore not low heat-conducting connecting between concrete and the rod iron can carry out heat conduction, influences the foil gauge measuring accuracy.
The utility model content
At the problems referred to above, the utility model aims to provide a kind of low cost of manufacture, measuring accuracy height, engineering staff and goes up manual concrete cracking test stand easily.In order to measurement and evaluation to concrete temperature stress, therefrom select optimized concrete mix for use, control the generation of distress in concrete to greatest extent, to realize improving the purpose of concrete durability.
For realizing this technical purpose, scheme of the present utility model is: a kind of concrete cracking test stand, comprise the test master component that is arranged on the test stand bearing, described this master component comprises the foil gauge of the temperature sensor of concrete forming mould, girder steel, mensuration girder steel temperature, the temperature sensor of measuring the concrete test object and mensuration girder steel dilatation, and described concrete forming mould is fixed together and is formed by four steels " recessed " font anchor clamps, gripping device, concrete sample groove; Described girder steel is for being arranged on each one of concrete forming mould both sides, all by dismantled and assembled low heat-conducting connecting with " recessed " the font anchor clamps firmly link to each other; Heating arrangement and attemperator also are installed on the described girder steel.
Described dismantled and assembled low heat-conducting connecting adopts low heat conduction Materials with High Strength, and it is provided with the antisliding apparatus that can firmly be connected with " recessed " font anchor clamps.
The concrete cracking test stand of this programme has heating arrangement, in the process of concrete shrinkage, give suitable heating for girder steel, make girder steel keep original length, guarantee the holonomic constraint of girder steel, guaranteed the accuracy of the differential contraction stress of measurement for the concrete test object; Also have the chuck fixator, solved the difficulty of removing test specimen well; And between concrete and girder steel, increased dismantled and assembled low heat-conducting connecting, and effectively cut off in the heat guiding girder steel of concrete test object, avoided the measuring error of foil gauge on the girder steel effectively.
Description of drawings
Fig. 1 is a positive elevational schematic view of the present utility model.
Fig. 2 is a side elevation synoptic diagram of the present utility model.
Fig. 3 is the utility model and the connection diagram that outreaches equipment.
Fig. 4 is sensing of the present utility model and control system schematic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further details.
As shown in Figure 1, 2, a kind of concrete cracking test stand of the present utility model, it comprises the test master component that is arranged on the test stand bearing, and described this master component comprises the foil gauge 8 of concrete forming mould, the girder steel 4 that is used for holding the concrete test object, the temperature sensor 7 of measuring the girder steel temperature, the temperature sensor 9 of measuring the concrete test object and mensuration girder steel dilatation; Described concrete forming mould is fixed together and is formed by four steels " recessed " font anchor clamps 1, gripping device 2, concrete sample groove 3; Described girder steel 4 is for being arranged on each one of concrete forming mould both sides, all by dismantled and assembled low heat-conducting connecting 5 with " recessed " font anchor clamps 1 firmly link to each other; Heating arrangement 6 and attemperator 11 also are installed on the described girder steel.Dismantled and assembled low heat-conducting connecting 5 adopts low heat conduction Materials with High Strength, its be provided with can with " recessed " antisliding apparatus that firmly is connected of font anchor clamps, help the dismounting work of concrete test object after the off-test.
The dismantled and assembled low heat-conducting connecting 5 of two girder steels 4 by connecting girder steel and anchor clamps with " recessed " font anchor clamps 1 firmly link to each other, the temperature stress of concrete sample can pass on the girder steel.
Fixing girder steel heating arrangement 6 on the girder steel 4 is measured the temperature of girder steels by temperature sensor 7, by data collecting card temperature data is transferred to computing machine, reaches the purpose of the temperature variation of controlling girder steel effectively.Foil gauge 8 can be measured the dilatation of girder steel under concrete temperature stress, and by data collecting card strain data is transferred to computing machine.
Before casting concrete, playback of the anchor clamps at two ends and concrete sample groove need be combined into air-tight state to the gripping device of test unit, then the concrete that stirs is put into wherein.On girder steel, fix simultaneously the position of foil gauge and temperature sensor.
As shown in Figure 3, respectively paste foil gauge, in order to measure the girder steel strain that concrete temperature stress causes in the both sides, front and back of girder steel.Foil gauge links to each other with foil gauge signal conditioner in the cabinet, and temperature sensor is connected with temperature signal regulation device in the cabinet.
As shown in Figure 4, various piece is combined into computer automatic analysis and temperature-controlling system.Wherein: the foil gauge signal conditioner converts the strain physical signalling of foil gauge to the demarcation resistance change, and data collecting card converts the demarcation resistance change to digital signal and sends computing machine to; The temperature signal regulation device converts the physical signalling of temperature sensor to the nominal voltage signal, and data collecting card becomes the nominal voltage conversion of signals digital signal to send computing machine to; The LabVIEW virtual instrument software of computing machine is operated on the Windows XP SP3 operating system and to the digital signal that obtains and handles, numerical value according to foil gauge is judged, provides corresponding control signal and sends the alternating current electric governor respectively to by data collecting card.
The above; it only is preferred embodiment of the present utility model; not in order to restriction the utility model, every foundation technical spirit of the present utility model to any trickle modification that above embodiment did, be equal to and replace and improve, all should be included within the protection domain of technical solutions of the utility model.
Claims (2)
1. concrete cracking test stand, comprise the test master component that is arranged on the test stand bearing, described this master component comprises concrete forming mould, girder steel (4), measures the temperature sensor (7) of girder steel temperature, measures the temperature sensor (9) of concrete test object and the foil gauge (8) of mensuration girder steel dilatation, and it is characterized in that: described concrete forming mould is fixed together and is formed by four steels " recessed " font anchor clamps (1), gripping device (2), concrete sample groove (3); Described girder steel (4) is for being arranged on each one of concrete forming mould both sides, all by dismantled and assembled low heat-conducting connecting (5) with " recessed " font anchor clamps (1) firmly link to each other; Heating arrangement (6) and attemperator (11) also are installed on the described girder steel.
2. concrete cracking test stand according to claim 1 is characterized in that: described dismantled and assembled low heat-conducting connecting (5) adopts low heat conduction Materials with High Strength, and it is provided with the antisliding apparatus (10) that can firmly be connected with " recessed " font anchor clamps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202205253U CN201707270U (en) | 2010-06-09 | 2010-06-09 | Concrete spilt test rack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202205253U CN201707270U (en) | 2010-06-09 | 2010-06-09 | Concrete spilt test rack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201707270U true CN201707270U (en) | 2011-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202205253U Expired - Fee Related CN201707270U (en) | 2010-06-09 | 2010-06-09 | Concrete spilt test rack |
Country Status (1)
| Country | Link |
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| CN (1) | CN201707270U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852384A (en) * | 2014-03-11 | 2014-06-11 | 中交四航工程研究院有限公司 | Numeralization evaluation method for crack resistance of concrete |
| CN104535431A (en) * | 2014-12-30 | 2015-04-22 | 中建商品混凝土有限公司 | Method and device for evaluating crack resistance of concrete under coupling action of temperature and shrinkage |
| CN106018094A (en) * | 2016-07-08 | 2016-10-12 | 清华大学 | Concrete temperature stress testing machine and creep testing method |
| CN107830795A (en) * | 2017-11-09 | 2018-03-23 | 广西交通科学研究院有限公司 | Fracture width variable quantity test device and its foil gauge combining structure |
| CN108020654A (en) * | 2017-11-09 | 2018-05-11 | 广西交通科学研究院有限公司 | A kind of fracture width changed measurement method for testing based on foil gauge |
-
2010
- 2010-06-09 CN CN2010202205253U patent/CN201707270U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852384A (en) * | 2014-03-11 | 2014-06-11 | 中交四航工程研究院有限公司 | Numeralization evaluation method for crack resistance of concrete |
| CN103852384B (en) * | 2014-03-11 | 2016-08-31 | 中交四航工程研究院有限公司 | A kind of concrete capacity against cracking quantizes evaluation methodology |
| CN104535431A (en) * | 2014-12-30 | 2015-04-22 | 中建商品混凝土有限公司 | Method and device for evaluating crack resistance of concrete under coupling action of temperature and shrinkage |
| CN104535431B (en) * | 2014-12-30 | 2017-11-17 | 中建商品混凝土有限公司 | Crack resistance evaluation method and device of the concrete under temperature, contraction coupling |
| CN106018094A (en) * | 2016-07-08 | 2016-10-12 | 清华大学 | Concrete temperature stress testing machine and creep testing method |
| CN107830795A (en) * | 2017-11-09 | 2018-03-23 | 广西交通科学研究院有限公司 | Fracture width variable quantity test device and its foil gauge combining structure |
| CN108020654A (en) * | 2017-11-09 | 2018-05-11 | 广西交通科学研究院有限公司 | A kind of fracture width changed measurement method for testing based on foil gauge |
| CN107830795B (en) * | 2017-11-09 | 2019-06-14 | 广西交通科学研究院有限公司 | Fracture width variable quantity test device and its foil gauge composite structure |
| CN108020654B (en) * | 2017-11-09 | 2019-06-14 | 广西交通科学研究院有限公司 | A kind of fracture width changed measurement method for testing based on foil gauge |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110112 Termination date: 20180609 |